You can acquire the ESET Smart Security Premium offline installer directly from the official ESET repository

Finish: The wizard will confirm the product being installed. Click Continue, then click Done once the process completes. 4. Post-Installation (Offline Maintenance)

1. No internet connection: If you don't have a stable internet connection, you can still install ESET Smart Security Premium using the offline installer.
2. Multiple installations: If you need to install ESET Smart Security Premium on multiple devices, an offline installer can save you time and bandwidth.
3. Remote installation: If you need to install ESET Smart Security Premium on a device that doesn't have an internet connection, an offline installer can be a convenient solution.

3. Slow or Unstable Internet (Rural or Traveling)

Have you ever tried to download a 300 MB file on a 1 Mbps hotel Wi-Fi connection that drops every ten minutes? It is infuriating. The offline installer lets you download the file at home (or at a coffee shop with fast Wi-Fi), save it to a USB stick, and install it later on your travel laptop.

2.3 Functional requirements

• Fully self-contained installer including application binaries, local virus signature database snapshot (if permitted), and offline activation flow.
• Support for Windows 10/11 x64 (can extend to older or other OSes).
• Command-line silent install and UI-based install options.